sadly enough, for linux and win32, i think all it means is that the system is broadcasting the fact that the responsible administrator is not applying security patches.
Linux at least seems to require a reboot for a new kernel rather a lot, like at least every couple of months.
On the bright side, $work is hosting the Melbourne Perl Monger meetings for an indefinite period, which is nice.
We had a meeting on Wednesday where we had a talk on git and lightning talks on fastcgi and port knocking. Followed up with beers across the road.